President Donald Trump announced a new executive order on Thursday aimed at eliminating taxpayer funds used to “incentivize” illegal immigration into the U.S. The order, signed late Wednesday, emphasizes that taxpayer resources should protect American citizens, not illegal aliens. It directs authorities to restrict federal or state programs from accessing funds for initiatives that may attract new arrivals, such as sanctuary measures in blue cities and states.

Local leaders in cities like New York and Philadelphia have resisted labeling their municipalities as sanctuaries, while Denver Mayor Mike Johnston vowed to resist federal efforts. The order underscores Trump’s commitment to defending taxpayer resources and protecting benefits for American citizens, including veterans and individuals with disabilities.

Illegal immigration has cost taxpayers an estimated $451 billion in recent years. Trump’s order could save at least $182 billion annually, according to estimates from the Federation for American Immigration Reform.